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Math Help - Please help me with mechanics motion due to gravity

  1. #1
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    Please help me with mechanics motion due to gravity

    A helicopter is hovering 490m above ground. A package is dropped from the heli, and 2 seconds later a 2nd package is dropped from same position.
    Find expressions for differences in height, distinguishing the cases 0-2, 2-10, 10-12 and >12 seconds.
    Sketch a graph to show the differences in height and find its greatest height, and find its greatest value

    answer given: 4.9 t^2, 19.6(t-1)m, ( 490-4.9(t-2)^2)m, 0; 176.4m

    thank you so very much
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  2. #2
    Forum Admin topsquark's Avatar
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    Re: Please help me with mechanics motion due to gravity

    Quote Originally Posted by mysur View Post
    A helicopter is hovering 490m above ground. A package is dropped from the heli, and 2 seconds later a 2nd package is dropped from same position.
    Find expressions for differences in height, distinguishing the cases 0-2, 2-10, 10-12 and >12 seconds.
    Sketch a graph to show the differences in height and find its greatest height, and find its greatest value

    answer given: 4.9 t^2, 19.6(t-1)m, ( 490-4.9(t-2)^2)m, 0; 176.4m

    thank you so very much
    You are given that each package is in free fall. So what is the equation to use to find the height of an object?

    -Dan
    Thanks from puresoul
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